sys-libs/zlib: keyword 1.2.12-r1

Issues are fixed now. Nothing else has come up other than the now-fixed
CC-configure issue.

Bug: https://bugs.gentoo.org/835958
Signed-off-by: Sam James <sam@gentoo.org>

sys-libs/zlib/files/zlib-1.2.12-fix-CC-logic-in-configure.patch

@@ -1,6 +1,6 @@
 https://github.com/madler/zlib/pull/607
 
-From c9b7587ff947638412a69df5ea820c563b8b1c1b Mon Sep 17 00:00:00 2001
+From 80d086357a55b94a13e43756cf3e131f25eef0e4 Mon Sep 17 00:00:00 2001
 From: Sam James <sam@gentoo.org>
 Date: Mon, 28 Mar 2022 08:40:45 +0100
 Subject: [PATCH] Fix CC logic in configure
@@ -10,6 +10,9 @@ the logic was changed to try check harder for GCC, but it dropped
 the default setting of cc=${CC}. It was throwing away any pre-set CC value as
 a result.
 
+The rest of the script then cascades down a bad path because it's convinced
+it's not GCC or a GCC-like compiler.
+
 This led to e.g. misdetection of inability to build shared libs
 for say, multilib cases (w/ CC being one thing from the environment being used
 for one test (e.g. x86_64-unknown-linux-gnu-gcc -m32 and then 'cc' used for
@@ -40,4 +43,3 @@ index 52ff4a04e..3fa3e8618 100755
  cflags=${CFLAGS-"-O3"}
  # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
  case "$cc" in
-

sys-libs/zlib/zlib-1.2.12-r1.ebuild

@@ -22,7 +22,7 @@ SRC_URI="https://zlib.net/${P}.tar.gz
 
 LICENSE="ZLIB"
 SLOT="0/1" # subslot = SONAME
-#KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris ~x86-winnt"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~x64-cygwin ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris ~x86-winnt"
 IUSE="minizip static-libs"
 
 RDEPEND="!sys-libs/zlib-ng[compat]"